System and method for speech personalization by need

ABSTRACT

Disclosed herein are systems, computer-implemented methods, and tangible computer-readable storage media for speaker recognition personalization. The method recognizes speech received from a speaker interacting with a speech interface using a set of allocated resources, the set of allocated resources including bandwidth, processor time, memory, and storage. The method records metrics associated with the recognized speech, and after recording the metrics, modifies at least one of the allocated resources in the set of allocated resources commensurate with the recorded metrics. The method recognizes additional speech from the speaker using the modified set of allocated resources. Metrics can include a speech recognition confidence score, processing speed, dialog behavior, requests for repeats, negative responses to confirmations, and task completions. The method can further store a speaker personalization profile having information for the modified set of allocated resources and recognize speech associated with the speaker based on the speaker personalization profile.

PRIORITY INFORMATION

The present application is a continuation of U.S. patent applicationSer. No. 14/679,508, filed Apr. 6, 2015, which is a continuation of U.S.patent application Ser. No. 12/480,864, filed Jun. 9, 2009, now U.S.Pat. No. 9,002,713, issued Apr. 7, 2015, the contents of which areincorporated herein by reference in their entirety.

BACKGROUND

1. Technical Field

The present application relates to speech recognition and morespecifically to personalized speech recognition.

2. Introduction

Speech recognition applications rely on speech recognition models.Often, a generic speech model is used to recognize speech from multipleusers. However, a single canonical model that represents all speakersgenerically is not well suited to many individuals in a givenpopulation. Individual speakers diverge from such a generic speech modelin subtle and not so subtle ways. Thus, one possible approach iscomplete personalization, or providing a personal speech recognitionmodel for each speaker. However, this solution has several flaws.Complete personalization for every speaker uses prohibitive resources,such as processing power, storage, and bandwidth. Further, not everyspeaker requires a personal speech recognition model. A generic modelmay adequately serve many speakers who are close to the generic model,so it is wasteful to provide a personal speech recognition model forthose speakers. Another problem with personal speech recognition modelsfor all users is that each model must be generated by a training phasewith each individual speaker. For these reasons, speech recognitionpersonalization is typically either viable with only a very small userbase or not viable at all.

SUMMARY

Additional features and advantages will be set forth in the descriptionwhich follows, and in part will be obvious from the description, or maybe learned by practice of the disclosed embodiments. The features andadvantages may be realized and obtained by means of the instruments andcombinations particularly pointed out in the appended claims. These andother features will become more fully apparent from the followingdescription and appended claims, or may be learned by the practice ofthe embodiments as set forth herein.

Disclosed are systems, computer-implemented methods, and tangiblecomputer-readable storage media for speaker recognition personalization.The method includes recognizing speech received from a speakerinteracting with a speech interface using a set of allocated resources,the set of allocated resources including bandwidth, processor time,memory, and storage. The method further includes recording metricsassociated with the recognized speech, and after recording the metrics,modifying at least one of the allocated resources in the set ofallocated resources commensurate with the recorded metrics, andrecognizing additional speech from the speaker using the modified set ofallocated resources. Metrics can include a speech recognition confidencescore, processing speed, dialog behavior, requests for repeats, negativeresponses to confirmations, and task completions. The method can furtherstore a speaker personalization profile having information for themodified set of allocated resources and recognize speech associated withthe speaker based on the speaker personalization profile.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which the above-recited and otheradvantages and features of the disclosure can be obtained, a moreparticular description above will be rendered by reference to specificembodiments thereof which are illustrated in the appended drawings.Understanding that these drawings depict only exemplary embodiments andare not therefore to be considered to be limiting of its scope, thisdisclosure will provide with additional specificity and detail throughthe use of the accompanying drawings in which:

FIG. 1 illustrates an example system embodiment;

FIG. 2 illustrates an exemplary method embodiment for speakerrecognition personalization;

FIG. 3 illustrates an exemplary system for recognizing speech usingspeaker recognition personalization;

FIG. 4A illustrates a first set of allocated resources; and

FIG. 4B illustrates a second set of personalized allocated resources.

DETAILED DESCRIPTION

Various embodiments are discussed in detail below. While specificimplementations are discussed, it should be understood that this is donefor illustration purposes only. A person skilled in the relevant artwill recognize that other components and configurations may be usedwithout parting from the spirit and scope of the disclosure.

Existing speech recognition applications use generic speech recognitionmodels for all speakers. Personalization creates user-specific acousticmodels tailored to recognizing speech from a particular person. Theseuser-specific acoustic models can include different transformations,dictionaries, language models, feature transformations, and so forth.The personalization approach can be very expensive in terms of time andeffort to generate personalized models in terms of processing power,RAM, storage space, and bandwidth. Under ideal circumstances,personalized acoustic models would be available for all speakers.However, personalized acoustic models are rarely a requirement for themajority of the speakers. For a specific minority with unusual dialectsand/or strong accents, such personalized models are valuable in order touse speech in any application. In one scenario, the system detects suchspeakers and provides a personalized speech recognition solution. Thepersonalized speech recognition solution can be speaker or speaker-classspecific. In one embodiment, a system determines a level ofpersonalization for each speaker within a few utterances and applies thepersonalization progressively based on additional speech interactionswith that speaker. Progressive personalization can occur as a user'saccent changes over time, based on a topic of speech, or based on otherfactors.

The costs and effort involved in providing complete personalization forevery speaker are prohibitive and often unnecessary. However in somecases, personalization is desirable. Most large scale deployments ofspeech recognition technology do not provide any personalization. In thecase of deployment on personal computers, personalization involvestraining the recognizer for a specific speaker. Speech service providersusing known approaches mostly ignore or very superficially and globallytreat personalization. The approach disclosed herein providespersonalization for a significantly increased segment of the speakerpopulation. More people can successfully use speech applications withminimal additional expenditure on the recognition infrastructure.

With reference to FIG. 1, an exemplary system includes a general-purposecomputing device 100, including a processing unit (CPU) 120 and a systembus 110 that couples various system components including the systemmemory such as read only memory (ROM) 140 and random access memory (RAM)150 to the processing unit 120. These and other modules can beconfigured to control the processor or CPU to perform various actions.Other system memory 130 may be available for use as well. It can beappreciated that the various embodiments may operate on a computingdevice with more than one CPU 120 or on a group or cluster of computingdevices networked together to provide greater processing capability. Aprocessing unit 120 can include a general purpose CPU controlled bysoftware as well as a special-purpose processor. Of course, theprocessing unit 120 includes any general purpose CPU and a moduleconfigured to control the CPU as well as a special-purpose processorwhere software is effectively incorporated into the actual processordesign. The processing unit 120 may essentially be a completelyself-contained computing system, containing multiple cores or CPUs, abus, memory controller, cache, etc. A multi-core processing unit may besymmetric or asymmetric.

The system bus 110 may be any of several types of bus structuresincluding a memory bus or memory controller, a peripheral bus, and alocal bus using any of a variety of bus architectures. A basicinput/output (BIOS) stored in ROM 140 or the like, may provide the basicroutine that helps to transfer information between elements within thecomputing device 100, such as during start-up. The computing device 100further includes storage devices such as a hard disk drive 160, amagnetic disk drive, an optical disk drive, tape drive or the like. Thestorage device 160 is connected to the system bus 110 by a driveinterface. The drives and the associated computer-readable media providenonvolatile storage of computer readable instructions, data structures,program modules and other data for the computing device 100. In oneaspect, a hardware module that performs a particular function includesthe software component stored in a tangible and/or intangiblecomputer-readable medium in connection with the necessary hardwarecomponents, such as the CPU, bus, display, and so forth, to carry outthe function. The basic components are known to those of skill in theart and appropriate variations are contemplated depending on the type ofdevice, such as whether the device is a small, handheld computingdevice, a desktop computer, or a computer server.

Although the exemplary embodiment described herein employs the hard disk160, it should be appreciated by those skilled in the art that othertypes of computer readable media which can store data that areaccessible by a computer, such as magnetic cassettes, flash memorycards, digital versatile disks, cartridges, random access memories(RAMs) 150, read only memory (ROM) 140, a cable or wireless signalcontaining a bit stream and the like, may also be used in the exemplaryoperating environment. Tangible computer-readable media expresslyexclude media such as energy, carrier signals, electromagnetic waves,and signals per se.

To enable user interaction with the computing device 100, an inputdevice 190 represents any number of input mechanisms, such as amicrophone for speech, a touch-sensitive screen for gesture or graphicalinput, keyboard, mouse, motion input, speech and so forth. The inputdevice 190 may be used by the presenter to indicate the beginning of aspeech search query. An output device 170 can also be one or more of anumber of output mechanisms known to those of skill in the art. In someinstances, multimodal systems enable a user to provide multiple types ofinput to communicate with the computing device 100. A communicationsinterface 180 generally governs and manages the user input and systemoutput. There is no restriction on any embodiment operating on anyparticular hardware arrangement and therefore the basic features heremay easily be substituted for improved hardware or firmware arrangementsas they are developed.

For clarity of explanation, the illustrative system embodiment ispresented as including individual functional blocks (includingfunctional blocks labeled as a “processor”). The functions these blocksrepresent may be provided through the use of either shared or dedicatedhardware, including, but not limited to, hardware capable of executingsoftware and hardware, such as a processor, that is purpose-built tooperate as an equivalent to software executing on a general purposeprocessor. For example the functions of one or more processors presentedin FIG. 1 may be provided by a single shared processor or multipleprocessors. Use of the term “processor” should not be construed to referexclusively to hardware capable of executing software. Illustrativeembodiments include microprocessor and/or digital signal processor (DSP)hardware, read-only memory (ROM) for storing software performing theoperations discussed below, and random access memory (RAM) for storingresults. Very large scale integration (VLSI) hardware embodiments, aswell as custom VLSI circuitry in combination with a general purpose DSPcircuit, may also be provided.

The logical operations of the various embodiments are implemented as:(1) a sequence of computer implemented steps, operations, or proceduresrunning on a programmable circuit within a general use computer, (2) asequence of computer implemented steps, operations, or proceduresrunning on a specific-use programmable circuit; and/or (3)interconnected machine modules or program engines within theprogrammable circuits. Generally speaking, such logical operations canbe implemented as modules configured to control a processor to performparticular functions according to the programming of the module. Forexample, FIG. 1 illustrates three modules Mod1 162, Mod2 164 and Mod3166 which are modules configured to control the processor. These modulesmay be stored on the storage device 160 and loaded into RAM 150 ormemory 130 at runtime or may be stored as would be known in the art inother computer-readable memory locations. In FIG. 3, these modules areshown in memory 312, but may be stored in other locations as well. It isunderstood that server 310 will include a processor and other componentsas those shown in FIG. 1.

Automatic speech recognition (ASR) is designed to allow callers tointeract with automated systems in a natural way through speech. Anexample ASR system can include device 100 in FIG. 1 or a network-basedsystem 300 in FIG. 3. For example, one or more of the modules 162, 164,166 can include the necessary programming to control the system toreceive speech input through input device 190 and control the processorto recognize the speech input and convert it to text. ASR can makepeople's lives easier through speech instead of or complementary totyping or other forms of input. ASR is not perfect; it makes mistakes.When speakers user ASR in busy or noisy circumstances, ASR typicallydoesn't perform well. As long as ASR works, most users accept some ofthe flaws and shortcomings. However for some people ASR almost neverperforms as desired because their English is not generic enough. Wholeclasses of speakers exist for which ASR will almost never work. A lot ofexpensive techniques can attempt to fix this problem in terms ofhardware, connectivity, bandwidth, etc. These techniques provide only amarginal improvement for typical native English speaker, but for theseother speakers, ASR shifts from being completely unusable to somewhatusable. This increase in usability is extremely noticeable and providesa concrete benefit for the affected speakers because they cansuccessfully use speech interfaces.

When the system 100 or 300 receives speech from a user, the system alsoreceives many criteria to detect category of speakers which may needhelp. The basic functions disclosed herein may be implemented via astandalone system or device 100 as shown in FIG. 1 or a network-basedsystem 300 as shown in FIG. 3. FIG. 3 is discussed below in the case ofthe system 100 of FIG. 1, the system 100 can include modules such as162, 164 and 166 that control the processor 120 to perform the functionsof ASR and other dialog management functions in addition to the stepsshown in FIG. 2. These speakers are the ones that require the mostassistance, so the system dedicates resources (up to and including themost sophisticated, expensive, advanced adaptation schemes) effectivelyto those callers because otherwise the system is unusable for them. Forspeakers where ASR mostly works, the system does not dedicate expensiveresources, and only provides the relatively inexpensive improvements. Inthis way, the system provides adaptation by speaker need.

Having disclosed some basic system 100, 300 components, the disclosurenow turns to the exemplary method embodiment shown in FIG. 2. For thesake of clarity, the disclosure discusses the method in terms of asystem 100, 300 configured to practice the method. In one embodiment,the various modules 162, 164, 166 can be stored on computer-readablestorage media and configured to control the processor 120 or server 310to perform the steps disclosed in FIG. 2 and other steps discussedherein. FIG. 2 illustrates an exemplary method embodiment for speakerrecognition personalization. The system 100, 300 first recognizes speechreceived from a speaker interacting with a speech interface 100, 300using a set of allocated resources, the set of allocated resourcesincluding bandwidth, processor time, memory, and storage (202) through afirst recognition module.

The system 100, 300 then records metrics associated with the recognizedspeech (204) through a recording module. Some examples of observedmetrics include speech recognition confidence score, processing speed,dialog behavior, requests for repeats, negative responses toconfirmations, and task completions. Other metrics are contemplated aswithin the scope of this disclosure. Observations of metrics alsoinclude trends in the observed data over time, even if that time isshort. The system 100, 300 can tailor these metrics to specific classesof callers or to specific tasks.

After recording the metrics, the system 100, 300 proceeds to modify atleast one of the allocated resources in the set of allocated resourcescommensurate with the recorded metrics (206) through a modificationmodule. The system 100, 300 can perform this step offline afterreceiving the speech or online while receiving the speech. The system100, 300 can allocate increased resources based on a difficultythreshold associated with how well the speaker interacts with the speechinterface 170, 190, 304. For example, if the system 100, 300 detectsthat the user is having only slight difficulty but is able to accomplishhis goals, then no additional resources are needed. However, if thesystem 100, 300 detects great difficulty and/or frustration in the formof numerous repeated utterances or phrases expressing aggravation, thenthe system 100, 300 can allocate more available resources to assist inspeech recognition for that speaker. In some extreme cases, allocatingadditional resources can even include transferring the caller to a liveagent. In these cases, the system 100, 300 can continue to monitor thespeaker's conversation with the live agent in order to improve therecognition next time that speaker or a speaker with a similar dialectcalls.

The system 100, 300 can use a speaker personalization storage module tostore a speaker personalization profile 315 in database 130, 314 toassist with the current received speech associated with the speaker orwith additional received speech, the profile having information for themodified set of allocated resources. It can store the speakerpersonalization profile 315 on a personalization server containingmultiple speaker personalization profiles. The system can recognizespeech associated with the speaker based on the speaker personalizationprofile 315. Each speaker personalization profile 315 can be associatedwith multiple individual speakers or with a class of similar speakers.

The system 100, 300 recognizes additional speech from the speaker usingthe modified set of allocated resources (208) through a secondrecognition module. The allocated resources can be one or more ofprocessing power, memory, storage space, and bandwidth. As mentionedabove, allocated resources can also include live agents to take over thecall. The system 100, 300 can apply a modified set of allocatedresources progressively. The system 100, 300 can allocate resources invarying degrees and increase resources progressively as needed by thespeaker. In another aspect, the system 100, 300 can transition betweenthe original or baseline set of allocated resources and the modified setof allocated resources while recognizing the additional speech from thespeaker. The system 100, 300 can commence this transition in part or inwhole as soon as at least one resource allocation is modified.

In some cases, the system 100, 300 does not need to detect the categoryof the speaker because the system 100, 300 can preclassify the callerbased on a phone ID or other identifier. The system 100, 300 can assumethe caller category and retrieve an appropriate speaker personalizationprofile. When the system 100, 300 receives the additional speech, it cancheck if the speaker is the expected speaker or not and cancel the extraresources if they are not needed. The system 100, 300 can include, forexample, a new dictionary, new acoustic model, new dialog manager, orany other appropriate resources. The system 100, 300 can essentially useany adaptation of anything to do with recognizing speech from theexpected speaker. In one example, a particular speaker always talksabout restaurants, so the system can adapt the dialog model to include avocabulary directed to restaurants instead of a generic speech model orinstead of an ill-suited specific vocabulary, such as a hardware store.The system 100, 300 can allocate additional bandwidth to transfer themodel, computational power to load and/or process the new model, etc.The system 100, 300 can preallocate resources for callers if they callon a regular schedule or if the system otherwise has reason to expect acall from a particular speaker. The system 100, 300 can consider speakerusage history and select offline how many and which resources toallocate to the speaker. The various functions disclosed herein can beimplemented in hardware via various modules 162, 164, 166 that arestored and configured to control a processor 120 to perform thespecifically programmed function.

FIG. 3 illustrates an exemplary system for recognizing speech usingspeaker recognition personalization. The system 300 first receivesspeech from a speaker 302. The speaker can communicate via a telephone304, computer, cellular phone, or any other audio communications device.Typically the system receives speech through a network 306 but thesystem can also receive speech through a direct connection. The speechcan be live or it can be prerecorded. The system can include anautomatic speech recognition (ASR) module 308 interfaced with a server310. The server 310 can include components such as a memory 312, storage314, and a processor 316. Storage 314 provides an exemplary location fora personalization profile base 315. This can be stored in other memorylocations as well. These components and others are included as speechrecognition resources.

The system 300 allocates additional resources or additional portions ofresources for identified speakers. When the server 310 receives atelephone call from a speaker 302, the server 310 can also receiveadditional information from the telephone or communications device 304,such as automatic number identification (ANI) information. The server310 identifies the caller 302 in a phone ID database 318. As the server310 and ASR 308 conduct a dialog with the user 302, the server observesand stores metrics as usage logs 320. The server 310 can organize theusage logs 320 by individual or by groups of similar individuals. Groupsof similar individuals can be formed based on geographical location. Inone example, all residents of a small rural town are likely to speak ina similar manner. The server 310 can store a single common town-wideusage log for all speakers of that small rural town.

In some cases, the server 310 can begin to allocate additional resourcesfor the user based on received ANI information, but the server 310monitors the speaker to ensure that it is the expected speaker. Forexample, a user can lend his cellular phone to a friend to make a call.The extra resources which may be needed for the user may not be neededfor the friend. In this case, the system can free the resources thatwere allocated for the expected speaker when it detects a less needyspeaker (the friend). An offline processing server 322 can process thephone ID database 318 and the usage logs 320 to determine which callersneed more attention, resources, or personalization. The offlineprocessing server 322 can be separate or it can be incorporated as partof the server 310. The offline server 322 can perform several levels ofanalysis at varying levels of detail and depth. For example, the offlineserver 322 can check usage logs with a faster, lower accuracy scan toassign a rough priority value. Based on the rough priority values, theoffline server can then analyze callers with higher rough priorityvalues in greater depth. The offline server 322 can determine whichresources are available and prioritize processing based on priorityvalues and resource availability. As the user 302 calls in again orcontinues to speak, the system allocates additional resources to speakerpersonalization commensurate with the observed metrics and recognizesthe additional speech using the allocated resources. The system canallocate additional resources dynamically. For example, if the system ispart of a conference call system which accepts voice commands, thesystem monitors the conference call but does not need to apply theadditional resources to recognizing speech from all the users. Thesystem can apply additional resources to speech originating from thoseusers who need it the most. The system can prepare acoustic models withtranscription.

FIG. 4A illustrates a first set of allocated resources such as CPU 402,RAM 404, bandwidth 406, and storage space 408. While these resourcestake very different forms and are measured in different ways, FIG. 4Arepresents these resources in a uniform manner as boxes 410 for purposesof explanation. The CPU 402 shows a portion 414 representing 50% of theavailable CPU power allocated and a 50% unallocated portion 412.Similarly, the RAM 404 shows a 19% allocated portion, the bandwidth 406shows a 70% allocated portion, and the storage space shows a 35%allocated portion. This set can represent a default resource allocationfor a typical speaker. However, when the system encounters a speakerthat requires personalized resources, the system allocates a second setof personalized resources, shown in FIG. 4B. For instance, the systemcan determine that it requires additional CPU 402, RAM 404, andbandwidth 406, but no additional storage space 408. The box 410 for theCPU shows the original allocated portion 414 plus an additionalallocated portion 416. The unallocated portion 410 shrinks accordingly.In this example, the CPU allocation increases from 50% in FIG. 4A to 86%in FIG. 4B. The RAM and bandwidth also increase. However, the system candetermine that it needs no additional storage space, as shown in FIG.4B. The system 100, 300 can increase or decrease allocated resourcesfrom the first set of resources to the second set. The system 100, 300can allocate these resources by percentage of the available resource asshown in FIGS. 4A and 4B. The system can also allocate fixed amounts ofresources instead of percentages, i.e. 32,768 KB of RAM or 120 Kb/s ofcombined sending and receiving bandwidth. The system 100, 300 canallocate one or more resources at multiple locations, such as bandwidthat multiple network segments and storage in multiple computers ordevices. One example of this is allocating an amount of bandwidth inmultiple routers and internal network segments. These allocatedresources can represent a minimum desired level of service for thesystem. If the system 100, 300 requests extra resources beyond theallocated resources and they are available, the system can use thoseextra resources for as long as they are available. The allocation of aresource can be greater or less than the original or baselineallocation, meaning that usage of a particular resource can be less thanit was in the unmodified set of allocated resources. The additionalallocated resources are used in addition to the baseline or originalallocated resources.

The system 100, 300 can provide various levels of personalization on asliding cost scale, where cost encompasses processing, memory, andbandwidth requirements. It provides different levels of personalizationto users based on the need to facilitate the successful use of speechapplications. The system 100, 300 determines the need based on observedrecognition confidence scores, processing speed, dialog behavior (suchas requests to repeat or negative responses to confirmations), taskcompletions, and a large number of other metrics that indicate thespeaker's difficulty in interacting with the speech interface. Thesystem 100, 300 makes a greater effort to minimize difficulties of usingthe speech interface when it detects that the user is encounteringspeech interface related problems. In this way, the system 100, 300 canefficiently allocate speech recognition resources to speakers with thegreatest needs and maximize the benefit of additional resource expensesin setting up speech applications.

The system 100, 300 provides maximized performance improvement for thespeakers that need it the most with minimal additional expenditures inprocessing power, memory and bandwidth. Speech and natural dialogapplications provide an automated means of completing a task. As long asthe user can complete a desired task, even if it at times the user mustmake additional effort to disambiguate misrecognitions, the system issuccessful. Using existing approaches, only a minority of speakers isunable to complete a desired task, irrespective of how much effort theymake, because generic speech recognition models do not provide a goodrepresentation of their unique voice, dialect, and/or accent. Thisapproach makes available the best personalization approaches to theneediest speakers with minimal additional expense, thereby maximizingthe impact of investing additional resources beyond a baseline ordefault level. The costs of this approach are significantly lower thanthe cost of providing personalization for every speaker.

Embodiments disclosed herein may also include tangible computer-readablestorage media for carrying or having computer-executable instructions ordata structures stored thereon. Such computer-readable media can be anyavailable media that can be accessed by a general purpose or specialpurpose computer, including the functional design of any special purposeprocessor as discussed above. By way of example, and not limitation,such computer-readable media can include RAM, ROM, EEPROM, CD-ROM orother optical disk storage, magnetic disk storage or other magneticstorage devices, or any other medium which can be used to carry or storedesired program code means in the form of computer-executableinstructions, data structures, or processor chip design. Wheninformation is transferred or provided over a network or anothercommunications connection (either hardwired, wireless, or combinationthereof) to a computer, the computer properly views the connection as acomputer-readable medium. Thus, any such connection is properly termed acomputer-readable medium. Combinations of the above should also beincluded within the scope of the computer-readable media.

Computer-executable instructions include, for example, instructions anddata which cause a general purpose computer, special purpose computer,or special purpose processing device to perform a certain function orgroup of functions. Computer-executable instructions also includeprogram modules that are executed by computers in stand-alone or networkenvironments. Generally, program modules include routines, programs,objects, components, data structures, and the functions inherent in thedesign of special-purpose processors, etc. that perform particular tasksor implement particular abstract data types. Computer-executableinstructions, associated data structures, and program modules representexamples of the program code means for executing steps of the methodsdisclosed herein. The particular sequence of such executableinstructions or associated data structures represents examples ofcorresponding acts for implementing the functions described in suchsteps.

Those of skill in the art will appreciate that other embodiments may bepracticed in network computing environments with many types of computersystem configurations, including personal computers, hand-held devices,multi-processor systems, microprocessor-based or programmable consumerelectronics, network PCs, minicomputers, mainframe computers, and thelike. Embodiments may also be practiced in distributed computingenvironments where tasks are performed by local and remote processingdevices that are linked (either by hardwired links, wireless links, orby a combination thereof) through a communications network. In adistributed computing environment, program modules may be located inboth local and remote memory storage devices.

The various embodiments described above are provided by way ofillustration only and should not be construed as limiting. For example,the principles herein are also applicable to voice over IP (VoIP),automatic speech recognition, natural language dialog systems, andspeech commands. Those skilled in the art will readily recognize variousmodifications and changes that may be made to the present disclosurewithout following the example embodiments and applications illustratedand described herein, and without departing from the true spirit andscope of the disclosed embodiments.

We claim:
 1. A method comprising: recording, via a processor, metricsassociated with recognized speech for each of a plurality of speakers,wherein the metrics are associated with at least one of a request forrepetition, a negative response to confirmation, and a task completion;after recording the metrics, while recording further speech from theeach speaker of the plurality of speakers, modifying, via a processor,an allocation of resources of a speech interface based on the metrics,to yield a modified speech interface; and recognizing, via the modifiedspeech interface, additional speech.
 2. The method of claim 1, whereinthe speech interface utilizes at least one of bandwidth and processortime to allocate resources for the recognizing speech.
 3. The method ofclaim 1, wherein the metrics further comprise a speech recognitionconfidence score, a processing speed, and a dialog behavior.
 4. Themethod of claim 1, wherein the identified speaker was determined to befrustrated and have great difficulty in a prior session.
 5. The methodof claim 1, further comprising storing a speaker personalization profilehaving information for the modified speech interface.
 6. The method ofclaim 5, further comprising recognizing speech associated with theidentified speaker based on the speaker personalization profile.
 7. Themethod of claim 5, further comprising storing the speakerpersonalization profile on a personalization server storing multiplespeaker personalization profiles.
 8. The method of claim 5, whereinmultiple speakers are associated with the speaker personalizationprofile.
 9. The method of claim 1, wherein the modified speech interfaceis associated with a class of similar speakers.
 10. The method of claim1, wherein modifying the allocation of resources is based on adifficulty threshold associated with how well the speaker interacts withthe speech interface.
 11. The method of claim 1, further comprisingprogressively applying the modified speech interface.
 12. The method ofclaim 1, wherein the resources each comprise at least one of memory andstorage.
 13. The method of claim 1, wherein an allocation of resourcesin the modified speech interface is greater than its correspondingallocation in a set of allocated resources prior to the modifying. 14.The method of claim 1, wherein an allocation of resources in themodified speech interface is less than its corresponding allocation in aset of allocated resources prior to the modifying.
 15. A systemcomprising: a processor; and a computer-readable storage medium havinginstructions stored which, when executed by the processor, result in theprocessor performing operations comprising: recording metrics associatedwith recognized speech for each of a plurality of speakers, wherein themetrics are associated with at least one of a request for repetition, anegative response to confirmation, and a task completion; afterrecording the metrics, while recording further speech from the eachspeaker of the plurality of speakers, modifying, via a processor, anallocation of resources of a speech interface based on the metrics, toyield a modified speech interface; and recognizing, via the modifiedspeech interface, additional speech.
 16. The system of claim 15, whereinthe speech interface utilizes at least one of bandwidth and processortime to allocate resources for the recognizing speech.
 17. The system ofclaim 15, wherein the metrics further comprise a speech recognitionconfidence score, a processing speed, and a dialog behavior.
 18. Thesystem of claim 15, wherein the identified speaker was determined to befrustrated and have great difficulty in a prior session.
 19. The systemof claim 15, the computer-readable storage medium having additionalinstructions stored which, when executed by the processor, result inoperations comprising storing a speaker personalization profile havinginformation for the modified speech interface.
 20. A computer-readablestorage device having instructions stored which, when executed by acomputing device, result in the computing device performing operationscomprising: recording metrics associated with recognized speech for eachof a plurality of speakers, wherein the metrics are associated with atleast one of a request for repetition, a negative response toconfirmation, and a task completion; after recording the metrics, whilerecording further speech from the each speaker of the plurality ofspeakers, modifying, via a processor, an allocation of resources of aspeech interface based on the metrics, to yield a modified speechinterface; and recognizing, via the modified speech interface,additional speech.